Two planets form a sesquiquadrate (or sesqui-square) when they are spaced about 135° apart, or a square and a half. It is a moderate tension, more insistent than the semi-square but less clear-cut than a full square — a friction that comes back in waves rather than continuously.
Angle: 135°. Orb used on this site: 2°.
Nature: classified as tense, in the same geometric family as the square (90°) and the semi-square (45°) — all multiples of 45°. See the Square entry for the major aspect of which this one is also a softened version.